
#container{
    width: 700px;
    margin: auto;
    text-align: center;

}
#top{
    width: 700px;
    background-color:blueviolet;
    height: 200px;
}
#left{
    width: 180px;
    height: 500px;
    background-color:brown;
    margin-top: 2px;
    float: left;
}
#right{
    width: 518px;
    height: 500px;
    background-color: chartreuse;
    margin-left: 2px;
    margin-top: 2px;
    float: left
}